Home / 129,221.12-193,831.68-71,221.76

Finding the Fourth Proportional to 129,221.12, 193,831.68 and 71,221.76

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Solution

The fourth proportional to 129,221.12, 193,831.68 and 71,221.76 is: 106,832.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,221.12 : 193,831.68 = 71,221.76 : x
  2. Step 2: Convert to fraction form
    129,221.12/193,831.68 = 71,221.76/x
  3. Step 3: Cross multiply
    129,221.12x = 193,831.68 × 71,221.76
  4. Step 4: Simplify right side
    129,221.12x = 13,805,033,393.36
  5. Step 5: Solve for x
    x = 13,805,033,393.36/129,221.12
  6. Step 6: Final answer
    x = 106,832.64

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.